<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 提示区域 -->
			<el-alert title="添加商品信息" type="info" center show-icon :closable="false">
			</el-alert>
			<!-- 步骤条区域-->
			<el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>
			<!-- tab栏区域-->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
				<el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="addForm.goods_number" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader expand-trigger="hover" v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange"></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							<!-- 复选框组 -->
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" :headers="headerObj"
						 list-type="picture" :on-success="handleSuccess">
							<el-button size="small" type="primary">点击上传</el-button>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						<quill-editor v-model="addForm.goods_introduce"></quill-editor>
						<!-- 添加商品的按钮 -->
						<el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
		<!-- 图片预览 -->
		<el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
			<img :src="previewPath" alt="" class="previewImg" />
		</el-dialog>
	</div>
</template>

<script>
	import _ from 'lodash'
	export default {
		data() {
			return {
				activeIndex: '0',
				//添加商品的表单数据对象
				addForm: {
					goods_name: '',
					goods_price: 0,
					goods_weight: 0,
					goods_number: 0,
					//商品所属的分类数组
					goods_cat: [],
					//图片数组
					pics: [],
					//商品的详情描述
					goods_introduce: '',
					attrs: []
				},
				addFormRules: {
					goods_name: [{
						required: true,
						message: '请输入商品名称',
						trigger: 'blur'
					}, ],
					goods_price: [{
						required: true,
						message: '请输入商品价格',
						trigger: 'blur'
					}, ],
					goods_weight: [{
						required: true,
						message: '请输入商品重量',
						trigger: 'blur'
					}, ],
					goods_number: [{
						required: true,
						message: '请输入商品数量',
						trigger: 'blur'
					}, ],
					goods_cat: [{
						required: true,
						message: '请选择商品分类',
						trigger: 'blur'
					}, ],
				},
				//商品分类列表
				catelist: [],
				cateProps: {
					label: 'cat_name',
					value: 'cat_id',
					children: 'children'
				},
				//动态参数列表数据
				manyTableData: [],
				//静态属性列表数据
				onlyTableData: [],
				//上传图片的URL地址
				uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
				//图片上传组件的请求头对象
				headerObj: {
					Authorization: window.sessionStorage.getItem('token')
				},
				previewPath: '',
				previewVisible: false
			}
		},
		created() {
			this.getCateList()

		},
		methods: {
			//获取所有商品分类数据
			async getCateList() {
				const {
					data: res
				} = await this.$http.get('categories')
				if (res.meta.status !== 200) {
					return this.$message.error('获取商品分类数据失败')
				}
				this.catelist = res.data
				console.log(this.catelist)
			},
			//级联选择器选中变化，会触发这个函数
			handleChange() {
				console.log(this.addForm.goods_cat)
				if (this.addForm.goods_cat.length !== 3) {
					this.addForm.goods_cat = []
				}
			},
			beforeTabLeave(activeName, oldActiveName) {
				if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
					this.$message.error('请选择商品分类')
					return false
				}

			},
			async tabClicked() {
				if (this.activeIndex === '1') {
					const {
						data: res
					} = await
					this.$http.get(`categories/${this.cateId}/attributes`, {
						params: {
							sel: 'many'
						}
					})
					if (res.meta.status !== 200) {
						return this.$message.error('获取动态参数列表失败')
					}
					console.log(res.data)
					res.data.forEach(item => {
						item.attr_vals =
							item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
					})
					this.manyTableData = res.data
				} else if (this.activeIndex === '2') {
					const {
						data: res
					} = await
					this.$http.get(`categories/${this.cateId}/attributes`, {
						params: {
							sel: 'many'
						}
					})
					if (res.meta.status !== 200) {
						return this.$message.error('获取动态参数列表失败')
					}
					console.log(res.data)
					this.onlyTableData = res.data
				}

			},
			//处理图片预览效果
			handlePreview(file) {
				console.log(file)
				this.previewPath = file.response.data.url
				this.previewVisible = true
			},
			//处理移除图片的操作
			handleRemove(file, i) {

				const filePath = file.response.data.tmp_path
				this.addForm.pics.findIndex(x =>
					x.pic === filePath)
				this.addForm.pics.splice(i, 1)
				console.log(this.addForm)
			},
			//监听图片上传成功的事件
			handleSuccess(response) {
				const picInfo = {
					pic: response.data.tmp_path
				}
				this.addForm.pics.push(picInfo)
				console.log(this.addForm)
			},
			//添加商品
			add() {
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) {
						return this.$message.error('请填写必要的表单项')
					}
					//执行添加的业务逻辑
					const form = _.cloneDeep(this.addForm)
					form.goods_cat = form.goods_cat.join(',')
					//处理动态参数
					this.manyTableData.forEach(item => {
						const newInfo = {
							attr_id: item.attr_id,
							attr_vals: item.attr_vals.join(' ')
						}
						this.addForm.attrs.push(newInfo)
					})
					//处理静态属性
					this.onlyTableData.forEach(item => {
						const newInfo = {
							attr_id: item.attr_id,
							attr_vals: item.attr_vals
						}
						this.addForm.attrs.push(newInfo)
					})
					form.attrs=this.addForm.attrs
					console.log(form)
					
					//发起请求添加商品
					//商品的名称，必须是唯一的
					const {data:res}=await this.$http.post('goods',form)
					if(res.meta.status!==201){
						return this.$message.error('添加商品失败！')
					}
					this.$message.success('添加商品成功!')
					this.$router.push('/goods')
				})

			}
		},
		computed: {
			cateId() {
				if (this.addForm.goods_cat.length === 3) {
					return this.addForm.goods_cat[2]
				}
				return null
			}

		}
	}
</script>

<style Lang="less" scoped>
	.el-checkbox {
		margin: 0 10px 0 0 !important;
	}

	.previewImg {
		width: 100%;
	}

	.btnAdd {
		margin-top: 15px;
	}
</style>
